Generics are generally pretty cheap. There are some indications that US doctors are incentivized to prescribe patented meds. I know I've received them when I strongly suspected a generic would have been fine.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8315858/

>These analyses included several types of prescribing decisions, finding that physicians who received industry payments were more likely to prescribe drugs made by the companies that had paid them over alternatives, had higher prescribing costs, and prescribed relatively more brand-name products over generic alternatives. The positive results of these studies spanned a broad range of physician specialties and drug classes.